Heading page
The parameters on the Heading page allow you to control the interface with external heading sensors.
How to open
This dialog box is opened from the Setup menu.
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Description
An external heading or course sensor is typically a global positioning system (GPS) or a dedicated gyro or compass. The sensor is connected using a serial or local area network (LAN) port on your Processor Unit. The information from the navigation sensors are shown on the top bar.
Details
Port
Select which serial or Ethernet port to use for this communication.
NMEA Sentence
Select which NMEA, third party or proprietary datagram format to be used for the communication.
•  Auto
The TV80 will read all relevant datagrams. If the specified information is provided to the system on more than one telegram format, a built-in priority list will be used.
•  NMEA HDT
The NMEA HDT datagram provides the true vessel heading. The information is normally provided by a course gyro.
•  NMEA HDM
The NMEA HDM datagram provides vessel heading in degrees magnetic. The datagram is no longer recommended for use in new designs. It is often replaced by the NMEA HDG telegram.
•  NMEA HDG
The NMEA HDG datagram provides heading from a magnetic sensor. If this reading is corrected for deviation, it produces the magnetic heading. If it is offset by variation, it provides the true heading.
•  NMEA VHW
The NMEA VHW datagram contains the compass heading to which the vessel points, and the speed of the vessel relative to the water.
Talker ID
If you want to specify a dedicated Talker ID for the datagram format, it can be defined here. Every NMEA datagram starts with a dollar ($) character. The "talker identifier" (ID) with two characters follows immediately after the dollar character. The Talker ID is followed by three characters that define the type of datagram. The Talker ID identifies the system that sends the datagram. When no Talker ID is defined, all identifiers are accepted.